A tablet computer middle frame and a tablet computer

Abstract

The utility model discloses a kind of middle frame of tablet computer and tablet computer, belong to electronic equipment terminal technical field.The middle frame of tablet computer includes frame and middle plate, middle plate is metal plate, the second surface of middle plate is equipped with mainboard cabin, battery cabin and antenna cabin;Between adjacent cabin and each cabin and the outer edge of middle plate is equipped with partition wall;The upper surface of partition wall is flush with the second surface of middle plate, lower surface is coplanar with the bottom surface of each cabin;Partition wall is uniformly distributed with multiple edge length same regular hexagon lightening hole;The depth h of regular hexagon lightening hole 26 satisfies following condition: (h1-h2) / 2≤h

Description

Technical Field

[0001] This utility model relates to the field of electronic device terminal technology, and in particular to a tablet computer frame and a tablet computer. Background Technology

[0002] Large-screen consumer electronics products such as tablets typically consist of major structural components such as the mid-frame and outer shell, as well as major functional components such as the display module, power module, and control module. The mid-frame, as the core load-bearing structure of the entire device, not only secures key functional components such as the screen, motherboard, battery, and antenna, but also provides rigid support, electromagnetic shielding, heat dissipation, and defines the overall appearance. To meet the requirements of structural strength, drop resistance, and precision assembly, current mainstream tablet mid-frames are generally made of metal materials such as aluminum alloy and magnesium alloy.

[0003] As the consumer electronics market matures, user demands have shifted from focusing on "features and battery life" to "design, details, and feel." This is especially true for large-screen tablets, where users, while pursuing high performance, also demand a thinner, lighter design and greater hand comfort. However, due to the density characteristics of metal materials, even with optimized thickness to achieve an extremely thin and light frame, its weight still constitutes a significant portion of the overall device, becoming a key factor affecting hand comfort. Utility Model Content

[0004] This utility model addresses the aforementioned problems in the prior art by providing a tablet computer frame and a tablet computer.

[0005] The tablet computer frame provided by this utility model includes a frame and a middle plate. The frame is arranged around the middle plate in the circumferential direction and is fixedly connected to the middle plate. The middle plate is a metal plate, and its first surface is provided with a screen compartment for mounting a display screen, and its second surface is provided with a motherboard compartment, a battery compartment and an antenna compartment for accommodating electronic components. The screen compartment, motherboard compartment, battery compartment, and antenna compartment are all recessed structures formed by recesses into the middle plate; The second surface is provided with partition walls between adjacent compartments and between each compartment and the outer edge of the middle plate; the upper surface of the partition wall is flush with the second surface of the middle plate, and the lower surface is coplanar with the bottom surface of each compartment. The partition wall has multiple hexagonal weight-reducing holes with the same side length evenly distributed; The depth h of the regular hexagonal weight-reducing hole satisfies the following condition: (h1-h2) / 2≤h in: h1 is the total thickness of the middle plate; h2 is the recess depth of the screen compartment; h3 is the minimum safe thickness required for the bottom plate of the screen compartment. ​

[0006] In the middle frame of the tablet computer of this utility model, the regular hexagonal weight reduction hole is completely closed at the edge of the partition wall, without any cut-off hole structure.

[0007] In the tablet computer frame of this utility model, the side length of the regular hexagonal weight-reducing hole is 2.5mm-3.5mm.

[0008] In the middle frame of the tablet computer of this invention, the plurality of regular hexagonal weight-reducing holes are arranged in a honeycomb pattern and periodically.

[0009] In the middle frame of the tablet computer of this utility model, the wall thickness of the regular hexagonal weight-reducing hole is 0.7mm-1.2mm.

[0010] In the tablet computer frame of this invention, the minimum safe thickness required for the screen compartment bottom plate is 0.7mm-1.2mm.

[0011] In the middle frame of the tablet computer of this utility model, the width of the partition wall is 10mm-15mm.

[0012] In the tablet computer frame of this utility model, the frame and the middle plate are integrally formed.

[0013] This utility model also provides a tablet computer, including the tablet computer frame as described above.

[0014] The present invention has the following beneficial effects: The tablet computer frame of the present invention has a motherboard compartment, a battery compartment and an antenna compartment set on the second surface of the middle plate, and a partition wall set between the adjacent compartments and between the compartments and the edge. The partition wall is provided with a plurality of evenly distributed, depth-controlled regular hexagonal weight reduction holes. While realizing the physical isolation of each functional area, effectively preventing electromagnetic interference and ensuring structural rigidity, the weight of the whole machine is significantly reduced. The depth design of the weight reduction holes takes into account lightweight, structural strength and screen installation reliability. This solution is particularly suitable for high-end tablet computers with strict requirements for thinness and high rigidity. Attached Figure Description

[0015] Figures 1-2 A perspective view of the tablet computer frame provided in an embodiment of this utility model.

[0016] Figure 3 A top view of the first surface of the tablet computer frame provided in an embodiment of this utility model.

[0017] Figure 4 A top view of the second surface of the tablet computer frame provided in an embodiment of the present invention.

[0018] Figure 5 A partially enlarged perspective view of the hexagonal weight-reduction hole in the middle frame of a tablet computer provided in an embodiment of this utility model.

[0019] In the attached diagram: 10. Frame; 20. Mid-plate; 21. Screen compartment; 22. Motherboard compartment; 23. Battery compartment; 24. Antenna compartment; 25. Partition wall; 26. Regular hexagonal weight reduction hole. Detailed Implementation

[0020] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] In reducing the overall weight of tablet computers, components such as the battery, display, and motherboard are typically excluded from weight reduction due to performance constraints. While lightweight materials like engineering plastics can be used for the casing, their weight percentage is usually less than 10%, resulting in limited weight reduction. Therefore, the metal frame becomes the primary target for weight reduction.

[0022] like Figure 1-5 As shown, this utility model embodiment provides a tablet computer frame, including a frame 10 and a middle plate 20. The frame 10 is arranged around the middle plate 20 in the circumferential direction and is fixedly connected to the middle plate 20. The middle plate 20 is a metal plate, and its first surface is provided with a screen compartment 21 for mounting a display screen, and its second surface is provided with a motherboard compartment 22, a battery compartment 23 and an antenna compartment 24 for accommodating electronic components. The screen compartment 21, motherboard compartment 22, battery compartment 23 and antenna compartment 24 are all recessed structures formed by recesses into the middle plate 20; A partition wall 25 is provided between adjacent compartments on the second surface and between each compartment and the outer edge of the middle plate; the upper surface of the partition wall 25 is flush with the second surface of the middle plate 20, and the lower surface is coplanar with the bottom surface of each compartment. The partition wall 25 has a plurality of regular hexagonal weight-reducing holes 26 with the same side length evenly distributed on it; The depth h of the regular hexagonal weight-reducing hole 26 satisfies the following condition: (h1-h2) / 2≤h in: h1 is the total thickness of the middle plate 20; h2 is the recess depth of the screen compartment 21; h3 is the minimum safe thickness required for the bottom plate of the screen compartment.

[0023] In some embodiments of this utility model, the frame 10 and the middle plate 20 are integrally formed. In some specific embodiments of this utility model, both the frame 10 and the middle plate 20 are magnesium-aluminum alloys, integrally formed by melt casting.

[0024] like Figure 1 , Figure 3 As shown, the first surface of the middle plate 20 is provided with a screen compartment 21 for mounting a display screen. (As shown...)​ Figure 2 , Figure 4 As shown, the second surface of the middle plate 20 is provided with a motherboard compartment 22, two battery compartments 23, and one antenna compartment 24. The screen compartment 21, motherboard compartment 22, battery compartment 23, and antenna compartment 24 are all recessed structures formed by indentation into the middle plate 20. On the second surface, partition walls 25 are provided at adjacent positions of the motherboard compartment 22, battery compartment 23, and antenna compartment 24, and at positions adjacent to the outer edge of each compartment and the middle plate 20. To ensure signal transmission quality, partition walls 25 are not provided in certain areas between the antenna compartment 24 and the edge of the middle plate 20, and in certain areas between the antenna compartment 24 and the motherboard compartment 22.

[0025] In some embodiments of this invention, the width of the partition wall is 10mm-15mm. A reasonable partition wall position and width can improve the overall strength of the tablet computer, provide a stable edge support platform for the battery and motherboard to prevent assembly warping, serve as an effective electromagnetic isolation barrier, and provide ample space for the arrangement of the weight-reducing perforation array.

[0026] In planar tiling structures, regular hexagons exhibit optimal geometric efficiency, enclosing the largest area when using the same material; conversely, they require the shortest boundary length to enclose unit areas of the same area. This characteristic gives them a significant advantage in material utilization during lightweight design. Furthermore, regular hexagonal structures possess excellent mechanical stability. Their geometric configuration is highly symmetrical—all six sides are of equal length, and all six interior angles are 120°, forming a uniformly distributed force transmission path. When a hexagonal structure is subjected to external forces in any direction, the stress can be efficiently transmitted along each side and evenly distributed throughout the unit and adjacent structures, avoiding localized stress concentration. This multi-directional collaborative load-bearing mechanism enables regular hexagonal structures to effectively maintain overall geometric integrity when subjected to compressive, shear, or impact loads, significantly improving the structure's buckling resistance and energy absorption efficiency. Therefore, regular hexagonal arrangements are widely used in lightweight, high-stiffness structural designs in aerospace, automotive, and consumer electronics industries. In this embodiment of the invention, multiple hexagonal weight-reducing holes are evenly arranged on the partition wall, which can not only basically ensure that the original strength of the middle frame remains unchanged, but also reduce the weight of the middle frame, reduce the consumption of metal materials in the middle frame, and reduce costs.

[0027] In this embodiment of the invention, the depth h of the regular hexagonal weight-reducing hole 26 satisfies the following condition: (h1-h2) / 2≤h in: h1 is the total thickness of the middle plate 20; h2 is the recess depth of the screen compartment 21; h3 is the minimum safe thickness required for the bottom plate of the screen compartment.

[0028] ​In this embodiment of the invention, the upper surface of the partition wall 25 is flush with the second surface of the middle plate 20, and the lower surface of the partition wall 25 is coplanar with the bottom surface of each compartment; therefore, h1-h2 is the height of the partition wall 25 on the second surface. The depth h of the regular hexagonal weight-reducing hole 26 needs to be greater than or equal to (h1-h2) / 2, that is, greater than or equal to half the thickness of the solid body in the area where the weight-reducing hole is located, to ensure sufficient weight reduction effect. Since the display screen structure is relatively fragile, its back needs to be uniformly supported by a flat and sufficiently rigid support surface; if the support is discontinuous or there is local suspension, the screen may crack or be functionally damaged due to stress concentration when writing or pressing with a stylus. Therefore, the depth h of the regular hexagonal weight-reducing hole 26 also needs to be less than h1-h2-h3, that is, to retain a minimum safe thickness on the bottom plate of the screen compartment.

[0029] In some embodiments of this invention, the minimum safe thickness required for the screen compartment base plate is 0.7mm-1.2mm. Setting the minimum safe thickness of the screen compartment base plate to 0.7mm–1.2mm effectively prevents the base plate from cracking or permanently deforming when subjected to the pressure of the display module and drop impacts. This thickness also balances the rigidity requirements of the metal frame with the utilization of internal space, avoiding the base plate being too thick and encroaching on the space for the battery or motherboard layout.

[0030] This utility model embodiment sets up a motherboard compartment, a battery compartment, and an antenna compartment on the second surface of the middle plate, and sets up partition walls between adjacent compartments and between compartments and edges. Multiple evenly distributed, depth-controlled regular hexagonal weight-reduction holes are set on the partition walls. While achieving physical isolation of each functional area, effectively preventing electromagnetic interference and improving structural rigidity, the overall weight is significantly reduced. The depth design of the weight-reduction holes takes into account lightweighting, structural strength, and screen installation reliability. This solution is particularly suitable for high-end tablet computers with stringent requirements for thinness and high rigidity.

[0031] like Figure 5 As shown, in some embodiments of this invention, the plurality of regular hexagonal weight-reducing holes 26 are arranged in a honeycomb-like periodic pattern. This honeycomb-like periodic arrangement of the regular hexagonal weight-reducing holes fully utilizes the mechanical advantages of the honeycomb structure, namely its high specific stiffness and high energy absorption efficiency. Compared to random or rectangular arrangements, the honeycomb arrangement provides a more uniform stress distribution and higher buckling resistance at the same porosity, while maximizing material utilization and achieving the best balance between lightweighting and structural performance.

[0032] If the size of the hexagonal weight-reducing hole is too small, the weight-reducing effect will be insignificant; if it is too large, it may affect the rigidity of the local partition wall, and after the product is assembled, it will create a bumpy feel when touched through the outer shell, affecting the user experience. In some embodiments of this utility model, the side length of the hexagonal weight-reducing hole is 2.5mm-3.5mm.

[0033] Figure 4 In some embodiments of this utility model, in order to maintain the integrity of the partition wall, the regular hexagonal weight-reducing hole 26 has a cut-off structure at the edge of the partition wall 25, and a certain width is reserved between the edge of the partition wall 25 and the edge of the regular hexagonal weight-reducing hole 26. Maintaining the integrity of the partition wall can minimize the impact on the strength of the partition wall.

[0034] In other embodiments of this invention, the hexagonal weight-reducing holes 26 are completely closed at the edge of the partition wall 25, without any interrupted hole structure. The complete closure of the hexagonal weight-reducing holes at the edge of the partition wall, without any interrupted holes, avoids stress concentration and edge strength reduction problems caused by the hole structure being cut off by the boundary. During the design, to maintain the continuity and integrity of the partition wall while ensuring that the edges of the hexagonal weight-reducing holes are not interrupted, a preset distance is reserved at the edge of the partition wall. The size of the hexagonal weight-reducing holes is finely adjusted according to the product dimensions to ensure that they are closely arranged within the partition wall without any interrupted holes at the edges. In some embodiments of this invention, the preset distance is 2mm.

[0035] In some embodiments of this invention, the wall thickness of the regular hexagonal weight-reducing hole is 0.7 mm to 1.2 mm. The hole wall thickness is the width of the solid material between adjacent holes. Limiting the hole wall thickness to 0.7 mm to 1.2 mm satisfies the processing requirements while ensuring that the partition wall has sufficient shear and tensile strength.

[0036] In practical implementation, software such as SolidWorks can be used to model the tablet computer product, designing the compartments and partitions of the mid-frame, and arranging hexagonal weight-reducing holes on the partitions. Then, finite element simulation software is used to perform static analysis and drop test simulations on the established model, adjusting the modeling parameters based on the simulation results. Through multiple iterations, the dimensions and wall thickness of the hexagonal weight-reducing holes are continuously optimized to obtain structural parameters that meet the product's requirements. The mid-frame body is then fabricated according to the designed structural parameters, and finally, hexagonal weight-reducing holes are machined within the partitions using CNC machining or laser processing, following a preset path. In a specific embodiment of this invention, the mid-frame is 223mm long, 186mm wide, and 4.2mm thick, the screen compartment depth is 0.7mm, the upper surface of the partition on the second surface is flush with the frame, corresponding to a product size of 10.3 inches, and the hexagonal weight-reducing holes have a side length of 2.6mm, a wall thickness of 0.8mm, and a depth of 2.0mm.

[0037] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many modifications under the guidance of the present invention without departing from the spirit and scope of the claims. All of these modifications are within the protection scope of the present invention.

Claims

1. A tablet computer frame, comprising a frame (10) and a middle plate (20), wherein the frame (10) is arranged circumferentially around the middle plate (20) and fixedly connected to the middle plate (20); the middle plate (20) is a metal plate, having a screen compartment (21) for mounting a display screen on a first surface, and a motherboard compartment (22), a battery compartment (23), and an antenna compartment (24) for accommodating electronic components on a second surface; characterized in that, The screen compartment (21), motherboard compartment (22), battery compartment (23) and antenna compartment (24) are all recessed structures formed by recesses into the middle plate (20); A partition wall (25) is provided between adjacent compartments on the second surface and between each compartment and the outer edge of the middle plate; the upper surface of the partition wall (25) is flush with the second surface of the middle plate (20), and the lower surface is coplanar with the bottom surface of each compartment; The partition wall (25) has multiple hexagonal weight-reducing holes (26) with the same side length evenly distributed on it. The depth h of the hexagonal weight-reducing hole (26) satisfies the following condition: (h1-h2) / 2≤h<h1-h2-h3, in: h1 is the total thickness of the middle plate (20); h2 is the recess depth of the screen compartment (21); h3 is the minimum safe thickness required for the bottom plate of the screen compartment.

2. The tablet computer frame according to claim 1, characterized in that, The hexagonal weight-reducing hole (26) is completely closed at the edge of the partition wall (25) without any cut-off hole structure.

3. The tablet computer frame according to claim 1, characterized in that, The side length of the regular hexagonal weight-reducing hole (26) is 2.5mm-3.5mm.

4. The tablet computer frame according to claim 1, characterized in that, The plurality of regular hexagonal weight-reducing holes (26) are arranged in a honeycomb pattern and periodically.

5. The tablet computer frame according to claim 4, characterized in that, The wall thickness of the regular hexagonal weight-reducing hole (26) is 0.7mm-1.2mm.

6. The tablet computer frame according to claim 1, characterized in that, The minimum safe thickness required for the bottom plate of the screen compartment is 0.7mm-1.2mm.

7. The tablet computer frame according to claim 1, characterized in that, The width of the partition wall (25) is 10mm-15mm.

8. The tablet computer frame according to claim 1, characterized in that, The frame (10) and the middle plate (20) are integrally formed.

9. A tablet computer, characterized in that, Includes the tablet computer frame as described in any one of claims 1-8.

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